基于FPGA多功能键盘显示控制器的设计与研究

Design and Research of Multi Function Keyboard Display Controller Based on FPGA

本文设计的多功能键盘显示控制器,可以完成直连键盘、矩阵键盘以及LED数码管动态扫描的全部工作,并且实现按键的识别以及自动连续功能,实现LED数码管的显示、闪烁以及小数点控制等功能,同时该控制器对外接口采用了常规的UART接口,制定了完善的通信协议,可实现键值的获取和对显示的控制。该多功能键盘显示控制器不但克服了传统单片机系统占用较多的I/O口线和系统资源的缺点,而且采用比较主流的现场可编程门阵列FPGA,功能灵活,使用方便。

The multi-function keyboard display controlle r can complete the tasks like direct keyboard, matrix keyboard, LED digital tube dynamic scanning, and it can realize key identification and automatic continuous function, the LED digital tube display, flashing and decimal point control function, and at the same time, the external interface of the controller uses a conventional UART interface, making a perfect communication protocol, which can realize the access keys and display control. The multi-function keyboard display controller not only overcomes the disadvantages of traditional SCM system that occupies more I/O port line and system resources, but also uses the field programmable gate array FPGA, a popular technique that makes it flexible and easy to use.